java: fix return types and arrays for mpu60x0 and mpu9150

Signed-off-by: Petre Eftime <petre.p.eftime@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/mpu9150/mpu9150.h

@@ -106,6 +106,17 @@ namespace upm {
      */
     void getMagnetometer(float *x, float *y, float *z);
 
+#ifdef SWIGJAVA
+    /**
+     * Return the compensated values for the x, y, and z axes.  The
+     * unit of measurement is in micro-teslas (uT).
+     *
+     * @return Array containing X, Y, Z magnetometer values
+     */
+    float *getMagnetometer();
+#endif
+
+
 
   protected:
     // magnetometer instance